Scaffold-support.



J. M. THORP.

SGAFFOLD SUPPORT.

APPLIGATION FILED MAR. 12, 1914- Patented Mar. 9, 1915.

Z y INVENTOR wmm THEXNDRRIS PETERS C0 PHOTC-LITHCL WASHINGTON, D. Cv

SGAIFFOLD-SUPPORT.

Specification of Letters Patent.

Patented Mar, 99, 191%,

Application filed March 12, 1914. Serial N 0. 824,210.

To all whom it may concern:

Be it known that 1, Jaime MADISON 'lrronr, a citizen of the United States, residing at Alameda, in the county of Alameda and State of California, have invented a new and useful Improvement in Scaffold-Supports, of which the following is a specification.

My invention relates to that class of cablesuspended scaffolds having the winding means located upon the scaffold platform; and the object of my invention is to provide safe and stable scaffold-supports, each support or putlog having but a single suspending cable, thereby simplifying the operation and cheapening the cost of manufacture and installation as will be hereinafter described.

Heretofore suspended scaffolds used by bricklayers and plasterers have two cables to each support or putlog, and these cables are suspended from Outriggers secured to and projecting from a building; in many instances, especially where the building roof is completed, it is not practicable to anchor the inner ends of the Outriggers to the finished roof, so that weights, such as sacks of sand, are used to hold down the cantaliver Outriggers, obviously considerable expense is entailed in hoisting this sand to the top of tall buildings and disposing of the same after use.

One object of the present invention is to provide a scaffold that may be used without the usual outrigger in cases where it is not convenient to anchor the same, or where blank walls without cornice or other projections, such as the walls of tall buildings adjoining lower buildings, are to be plastered.

With these and other objects in View I will describe a scaffold embodying my invention.

Reference is had to the accompanying drawing, in which Figure 1 is a vertical section through a wall of the usual steel and brick building, and an end view of a scaffold made accord ing to my invention and showing one support only of the series intended; Fig. 2 a side view of the scafi'old looking toward the building, with the guard post and guy-rope drum not shown; Fig. 3 a similar view showing how the hanger frame may be projected above the outrigger; and Fig. 4: a side view of the guard post, socket and guy-rope drum.

Similar characters of reference represent similar parts throughout the several views.

Fig. 1 represents the usual steel building with the brick wall partly laid up, and B the usual outrigger, somewhat shortened, from which the scaffold is suspended; the remainder of the figure shows the new form and combination of parts embodying my invention. The putlog consists of the two angle irons 1 spaced apart, and having the buffer block 2 pivoted between the inner ends and the guard post socket 3 rigidly fixed between the outer ends, the drum frame consists of the two channel irons 4: 4, the flanges of which are flattened at the lower ends, to take up less space between the planks, and turned to form an eye the full width of the channel iron and the distance between the putlog members which are bolted thereto, the drum axle 5, the follower axle 6 and the spacer and tie rod 7- are each shouldered and screwthreaded at the ends and rigidly secured with nuts through holes in the frame; a winding drum 8 made integral with a worm gear is rotatively mounted on the axle 5, a worm 9 is mounted between the brackets 10 which are secured to one of the frame members, and a follower pulley mounted on the axle 6; an extension or stabilizer frame of two slightly smaller channel irons 12 is detachably bolted at the lower ends between the flanges of the drum frame as at 13 Fig. 2 and also secured by nuts of the follower axle 6; in the top of this frame is inserted the slotted end of the eye-block 14c which is clamped between the frame members by the eye-bolt 15 and nut 16; intermediate the ends is a spacing sleeve 17 riveted at the ends to the frame and through bolted thereto, the bolt head 18 being formed like a rope cleat, and with a nut 19 on the opposite end, this spacing sleeve is divided in the middle at 20; a socket 21 is fixed on one side of the frame near the top. In the socket 3 is set the guard post 22 upon which is mounted a small drum provided with a crank and pawl, the post preferably being made of channel iron to allow the guy-rope 23 to run between the flanges thereof, the usual safety guard rope is run through the eye 34 secured to the top of the post.

I have shown a worm gearing as the drum operating means, and certain channel and angle iron members as preferred for constructing the frame, obviously any other form of gearing and other shapes of metal such as bars or rods may be substituted therefor without-departing 'from'the spirit of my invention. I

In operation, a cable 24L attached to the drum 8 is passed over a follower pulley mounted on the axle 6, through the eyeblock 14 at the top of the frame and secured to the Outrigger B in a suitable manner, the stabilizer frame will now assume the position shown at 25 and the platform will be tilted about six degrees outward as shown in dotted line 26, this is the hoisting position :and the line of suspension is at C, the stabihzer frame being comparatively long the scafiold is s-ufficiently stable to allow shifting offthe load from side to side, such as men Walking thereon, but when the scaffold has been raised to the required height the rope 27 is made fast to any desired point upon the building as at 28 and passed through the eye 15, then by pulling on the rope the stabilizer frame will be drawn to ward the building as shown and the platform will assume a horizontal position, the rope is then made fast on the cleat 18, the line of suspension'is then at D with the scaffold hanging from the substantially fixed point 14 l-r5,'this-ma kes a scaffold sufficiently stable for many purposes, but to further steady the platform the guy-rope 28 is attalehed to the building below the scaffold as shown and drawn taut by the'drum 29, the strain being opposed to that of the rope 27 :so the bufier-block 2 will bepressed tightly against the building while all the reacting forces tend to steady the platform; it will be noted that the stabilizer and drum frames are not at right angles to the platform, one reason for this is seen from the foregoing description, still another reason is, that in some instances, such as where it is desired to iplaster a blank wall with no means of fastening the ropes 23 and 27 the same are omitted, together with the outrigger B, the cable 2% being fastened to the top of the building wall, the face line of which is shown at 30, the cable taking the inner dotted line substantially as shown, this inslope of the cable Will cause the scaffold to hug the building and the long length of the stabilizer frame and rigid connection to the putlog will give great stability. When the inner half of the platform is loaded the heaviest and the cable is placed in the position last described the scaffold will have a tendency to tilt inward, to offset this the steady-buffer 82 is inserted in the socket 21 with one end bearing against the wall; in tall buildings where a double tier of scaffolding is used the workmen on the lower tier must be protected from material falling from the scaffold above, in such instances the buffer will act as a support upon which to lay the protecting cover: When nearing the top of the building the eye-block l t at the top of the stabilizer frame will abut the outrigger or the cable clamp thereon and will stop further raising, the frame being approximately eight feet high the workmen can not build the wall as high as desired, when this occurs the bolt 15 is loosened and the eye-block lat taken out and placed in the divided bracket at 20 and clamped by tightening the cleat bolt 18, this will allow the frame to pass by the outrigger, as shown in Fig. 3, thus leaving a space of only five feet from platform to outrigger.

Besides the advantages described, an uninterrupted passage is had along the platform next to the Wall and a similar passage along -the outer edge, while the center of the platform between the drums, is used for material.

It is-found by experiment that with the suspending cable in position of the inner dotted line and the guy rope .28 drawn taut both the rope 27 and the buffer 32 may be dispensed with and still the scaffold is sufiiciently stable for most purposes.

The hangers are made in detachable sections as described, for shipping purposes, thus the stabilizer members 12 may be detached from the drum frame by unscrewing the bolts 13 :and the nuts of the axle G, and the putlog is separated from the frame by taking out the bolts at the lower end thereof, while the guard post 22 is merely withdrawn from the socket 3.

Having thus fully described my invention, what 1 claim as new and desire to secure by Letters Patent is 1. A scaflold support, comprising putlog members, a drum supporting frame rigidly secured to the central portion of said putlog members and disposed at an angle of approximately 84 degrees thereto, a vertical extension stabilizer frame detachably scoured to said drum supporting frame, said stabilizer frame having an eye-block secured to the apex thereof, and cable winding means mounted upon said drum supporting frame, substantially as and for the purpose described.

2. In a scaffold support, putlog members having a drum supporting and vertical extension stabilizing frame mounted approximately at right angles thereto and rigidly secured to the central portion thereof, eyebolt and cleat arrangement upon one side of said stabilizer frame, and an eye-block at the apex thereof, and cable winding means located within said drum supporting frame, substantially as set forth.

3. In a scaflold support, a vertical extending stabilizing frame having an eyeblock at the apex thereof, a sectional spacing sleeve secured by a cleat-headed bolt, intermediate the ends of the said frame between the sections of which sleeve the eyeblock may be alternatively placed, in combination with a scafiold platform and scafplatform supported thereby, substantially as fold :IImiStingEmeanS. shown and described.

4:. n a sea 01d support a guard post having a drum, crank and pa W1 mounted there- JAMES MADISON THORP a on, said post being socketed to one end of a Witnesses:

scaflold putlog, hoisting means secured to F. A NEVILLE, the central portion of said putlog and a JOHN L. HOWARD, Jr.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

